public async void All_Not_Exists() { SaleControllerMockFacade mock = new SaleControllerMockFacade(); mock.ServiceMock.Setup(x => x.All(It.IsAny <int>(), It.IsAny <int>(), It.IsAny <string>())).Returns(Task.FromResult <List <ApiSaleServerResponseModel> >(new List <ApiSaleServerResponseModel>())); SaleController controller = new SaleController(mock.ApiSettingsMoc.Object, mock.LoggerMock.Object, mock.TransactionCoordinatorMock.Object, mock.ServiceMock.Object, mock.ModelMapperMock.Object); controller.ControllerContext = new ControllerContext(); controller.ControllerContext.HttpContext = new DefaultHttpContext(); IActionResult response = await controller.All(1000, 0, string.Empty); response.Should().BeOfType <OkObjectResult>(); (response as OkObjectResult).StatusCode.Should().Be((int)HttpStatusCode.OK); var items = (response as OkObjectResult).Value as List <ApiSaleServerResponseModel>; items.Should().BeEmpty(); mock.ServiceMock.Verify(x => x.All(It.IsAny <int>(), It.IsAny <int>(), It.IsAny <string>())); }